Concept:Rearranging jumbled sentence parts by applying the rules of conjunction pairs, relative clauses, and logical syntactic order to form a coherent sentence.
Explanation:The given introductory clause uses the specific structure "Hardly had...".
In English grammar, this structure is always paired with the conjunction "when".
Therefore, part P ("when the people") must come immediately after the introductory clause.
Both options A and D start with P, so we must check the next part.
After saying "the people", we need to specify which people are being referred to.
This is done using the relative clause R ("who had come to receive him").
A relative clause always directly follows the noun it modifies, so R must be the second part.
This eliminates option D and confirms that the sequence begins with P, R.
Now, the complete subject ("the people who had come to receive him") requires a main verb.
Part Q ("waved and cheered") provides this action for the subject.
Finally, the adverbial phrase S ("from the airport lounge") logically concludes the sentence by telling us where the action took place.
Thus, the correct order is P, R, Q, S.
Answer:A. P R Q S